Senior Fullstack AI Engineer (w/m/d)

Stackfuel·Berlinsenior

In short

→Desarrollas plataformas de aprendizaje adaptativas con IA desde la base hasta el frontend.
→Implementas funciones de IA (LLM, caminos de aprendizaje dinámicos, generación automática) y herramientas internas para equipos de operaciones.
→Trabajas en un producto existente y en desarrollo simultáneo, con impacto directo en miles de usuarios y empresas alemanas.

Business-fluent English

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The questions they'll ask you

1. ¿Cómo has usado LLMs en producción para generar contenido estructurado? (Ej: formato JSON, validación)

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💵 USD · Remote · No visa

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What they ask for

✓5+ años de experiencia en desarrollo fullstack con responsabilidades de arquitectura
✓Experiencia práctica con APIs de LLM (diseño de prompts, salidas estructuradas, evaluación)
✓Dominio de Python (FastAPI o Django) y TypeScript/React
✓Experiencia con PostgreSQL y migraciones de esquema
✓Disciplina en pruebas y CI/CD (pytest, código tipado, GitHub Actions)
✓Inglés fluido y alemán B1-B2 como mínimo

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PythonFastAPIDjangoTypeScriptReactPostgreSQLDockerGitHub ActionsLLM APIsObservability

Who should you write to at Stackfuel?

Your free dossier identifies the people who'd interview you — their background, what they value, and how to reach out so you stand out before applying.

Job description For years, StackFuel has been one of Germany’s leading providers of data and AI training. Since early 2026, we have been part of Multiverse, Europe’s only EdTech unicorn and the continent’s largest AI upskilling platform. Together, we are pursuing a clear goal: to make 100,000 employees in Germany AI-ready and close the country’s data and AI skills gap. To make this happen, we are building a next-generation adaptive learning platform from Berlin, AI-first from the ground up. Alongside this, we develop software tools and automations that integrate into our customers’ B2B platforms. As a Senior Fullstack AI Engineer (m/f/d), you’ll play a key role in shaping this platform and these software tools, from the database to the frontend. Your work directly reaches thousands of learners and contributes to the transformation of mid-sized and large German companies. g. pytest, typed code, GitHub Actions or similar) Experience with Docker-based deployment and a foundation in observability Business-fluent English and ideally German at B1–B2 level This role probably isn’t for you if… This role is probably not the right fit if you only want to work on greenfield projects. Alongside building our new platform, you’ll also continue developing our existing learning framework, and both are equally part of the job. It’s also not a good fit if you see AI tools as a nice extra rather than something that fundamentally changes how we build software. And if internal tools appeal to you less than the big product, you probably won’t be happy here: the back office for Learning Coaches, Client Operations, and Sales is a central part of the role, and it’s often where you’ll feel your impact most quickly. What we offer Work culture A solution-oriented, data-driven way of working, an open feedback culture, and strong team spirit. Two Trustees, elected by the entire StackFuel team, act as a neutral, confidential point of contact for your questions and concerns. Ownership Take on responsibility from day one, actively contribute your own ideas, shape processes sustainably, and have a real influence on how we work. Hybrid working We work in a hybrid model and are usually in our Berlin office 3 days a week. Workation Work from anywhere in the EU, the EEA, and Turkey for up to 10 days per year. Room for exchange Regular team exchanges, seasonal celebrations, and an always well-stocked kitchen make for a lively atmosphere. Professional development Take our online trainings to expand your skills and become an expert in data and AI.

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